// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Copy one face style to another
// Not compiled or tested in-world
// Setup: Set SOURCE and TARGET to different existing faces in one prim. Owner-touch copies the limited style; touch again restores target.
// Stop / restore: Owner-touch again to restore the startup snapshot before removal or reset, unless setup describes a different cycle. Do not relink during a preview.
// Notes: Use a spare modifiable build. Saved state lives only in script memory. Does not copy PBR, normal/specular maps, alpha mode, texgen or texture animation. Source texture must be readable and reusable.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Not compiled or tested in-world.
integer SOURCE=0;
integer TARGET=1;
integer preview;
list saved;
list capture(integer face)
{
    return [PRIM_TEXTURE,TARGET]+llGetLinkPrimitiveParams(LINK_THIS,[PRIM_TEXTURE,face])
    +[PRIM_COLOR,TARGET]+llGetLinkPrimitiveParams(LINK_THIS,[PRIM_COLOR,face])
    +[PRIM_GLOW,TARGET]+llGetLinkPrimitiveParams(LINK_THIS,[PRIM_GLOW,face])
    +[PRIM_FULLBRIGHT,TARGET]+llGetLinkPrimitiveParams(LINK_THIS,[PRIM_FULLBRIGHT,face]);
}
default
{
    state_entry()
    {
        if(TARGET>=0&&TARGET<llGetNumberOfSides())saved=capture(TARGET);
    }
    touch_start(integer n)
    {
        if(llDetectedKey(0)!=llGetOwner()||SOURCE==TARGET||SOURCE<0||SOURCE>=llGetNumberOfSides()||!llGetListLength(saved))return;
        preview=!preview;
        if(preview)llSetLinkPrimitiveParamsFast(LINK_THIS,capture(SOURCE));
        else llSetLinkPrimitiveParamsFast(LINK_THIS,saved);
    }
}